Automatic hand riveting machine



April 1935. R. c. McKlNNIE AUTOMATIC HAND BIVETING MACHINE Filed. Sept. 22 1955 INVENTOR.

Pa nk/ d/yafi/y/mz. BY W 7% W ATTORNEY.

Patented Apr. 16, 1935 UNITED STATES PATENT OFFICE This invention relates to riveting machines and particularly to that type of machine adapted to use split rivets.

The principal object of the invention is the provision of an improved device of the character indicated which can readily be used to fasten together the exposed edges of sheet roofing material as described in my co-pending application, Serial Number 667,963.

Another object of the invention is the provision of an automatic portable hand riveting" machine which can be efiiciently operated with a minimum of physical exertion.

Another object of the invention is the provision ofa device of the character referred to which is capable of attaching a'plurality of split rivets in succession without the necessity of reloading.

Another object of the invention is the provision of a device of the character referred to having a fullfloating jaw mechanism adapted to firmly grip the rivet and maintain it in alignment while it is being forced through the material to be ted, 3 i J 1 Another object of the invention is the provision of a riveting machine which is economical to manufacture, simple in construction and easy'to operate. U

With these'and other objects in view, it will be seen that the invention consists of certain novel features of-design and construction and in the particular combination and arrangement of parts, all of which will be better understood after a careful examination is made of the following specifications, reference being had at the same time to theaccompanying drawing in which:

Fig. 1 is a side elevational view of the device embodying my invention with parts broken away to illustrate the relative position of. the several elements.

Fig. 2 is a front elevational view of my improved riveting machine. I

Fig. 3 is a sectional view taken on line 3-3 of Fig. 1. I

Fig. 4 is asectio nal View taken on line 4--4 of Fig. 3. I

Fig. 5'lS a sectional view taken ,onjline 5-'5 of Fig. 3. 1

Fig. 6 is'a sectional view taken on line 6-6 of Fig. 5

Fig. 7 isa sectional view taken on line 5--5 of Fig. 3.

' Fig. 8 is a sectional view taken'on line 8-8 of Fig. 7.-

Fig. 9 is a sectional view of a completely stapled split rivet.

Referring now more particularly to the drawing it will be seen that the principal working parts of the device embodying my invention are housed within and carried by a body portion l2, which is preferably made of aluminum or other light material cast in such manner as to form,

| 4, and at the other end an angularly disposed portion I5 terminating in a clevisv I6. An operating lever I1 is mountedpwithin the clevis l6 upon a fulcrum pin l8, and is permitted to make substantial downward movement from the position as shown in Fig. 1, whereas'its upward movement from the same position is limited by the head l9, which is adapted to contact the angular portion |5 of the body l2 to form a stop. The limited upward movement of the lever ll permits the device to be carried about in a substantially horizontal position by simply grasping the operating lever instead of having tograsp both the handles l3 and H. The free end. of the, lever I'l has a cross section'similar to the cross section. of the handle l3 but inverted. 'Press fitted into the underside of the lever I1 is a flat headed stud 20, preferably made of steel or other hard material, and adapted to act as a bearing surface between the lever l1 and the plunger 2|, which is slidably mounted in a vertical passageway 22 positioned in the body. I2. Within the passageway 22 is a spring 23, which is adapted to exert pressure against the shoulder 24 of the plunger 2| to normally maintain the plunger 2| in the extended position as shown in Fig. 1. A bushing 25 is press fitted into the upper end of the passageway 22 and serves as a guide for the plunger 2| and a stop to limit its upwardmovement. The plunger 2| has a reduced portion 26 adapted to travel in a smaller passageway 21 which extends downwardly from the bottom of the passageway 22. Centrally formed on the lower extremity of the reduced portion '26 of the plunger 2| is ateat 28, which is adapted to engage a recess 29 formed in the head of the rivet 30 and serves the purpose of assisting to hold the rivet 30 in an upright position during its downward movement as hereinafter described.

A'vertical slot 3| is machined in the body portion l2 and is of sufiicient size to receive afiat spring 32, one end'of which spring 32 is secured to a stud 33 by means of'a screw 34. The stud. 33 passes completely through the'body l2 and jaws 48 and 49. To insure perfect vertical alignhas a groove in one end capable of receiving a screw driver so that it can be turned to adjust the tension on the spring 32. A set screw 35 is adapted to secure the stud 33 in its bearing when the desired tension is obtained on the spring 32. The free end of the spring 32 is fixed to the rivet feed slide 36 by means of a knurled knob 31.

Extending between depending flanges formed on the lower portion of the body I2 and secured thereto by means of screws 38, is a rivet magazine 39, which is provided with a full length longitudinal slot 49 adapted to receive a plurality of rivets placed side by side in a vertical position. Plates 4| and 42 are secured to the top of the rivet magazine 39 by means of screws 43, and are adapted to maintain the rivets in alignment and serve as retaining elements and guides for the slide 36. The forward travel of the slide 38 is terminated by a stop plate 44 which is secured to the magazine 39 by screws 45.

One of the features of my invention is the full floating jaw arrangement which I will now describe. It is this feature of the invention which permits the rivet to be held firmlyin a' vertical position while it is being forced through the heavy material to be riveted. To effect the full floating jaw arrangement referred to, I provide a U-shaped'member 46 which I secure to the end of the rivet magazine 39 by means of screws 47. The U-shaped member 49 serves as a housing and a guide for the jaws 48 and 49, which are adapted to reciprocate vertically therein. The jaws 48 and 49 are normally held closed by means of two concealed compression springs 59 and 5!, which in turn are held in place by means of a bolt 52 which is provided, at one end, with a head 53 and at the other end with a cotter pin 54, as shown in Fig. 4. .The jaws 48 and 49 are normally held in retracted vertical position, as shown in Fig. 2, by means of tension springs 55 and 56 which are securely fastened to spring studs 51 and 58, which are screwed into the sides of the body l2, and to the spring studs 59 and 69 which pass through vertical slots 61 and 62 in the U-shaped member46 and are screwed into the ment of the jaws 48 and 49, a gib 63 is formed on the inner side of the U-shaped member 46 and a gib 64 is formed on the end of the rivet magazine 39, said gibs 63 and 64 being adapted to engage vertical grooves formed on the front and back, respectively, of the jaws 48 and 49.

' A semi-cylindrical groove 65'is formed on each jaw 48 and 49, which grooves together comprise a vertical passageway through the. jaws 48 and 49 to permit the passage there-through of the reduced end 26 of the plunger 2|. Concentric with the groove 65 a ring-shaped groove 69 is machined in each jaw 48 and 49. The last named groove 66 is normally in direct alignment with the rivet head passageway 49 extending through the rivet magazine 39, and is of such depth and contour as to engage the head of rivet 39. When such engagement is had, the rivet 39 is securely held in the jaws 48 and 49 with the shank of the rivet 39 extending downwardly through the jaws, as shown in Fig. 5, in which position the rivet 39 is ready to be struck by the reduced end 26 of the plunger 2 I. It will be noted that when the rivet is struck by the plunger 2 I, the jaws 48 and 49 are also actuated downwardly for the reason that the head of the rivet 39 still reposes in the groove 66 and is being firmly gripped by the jaws 48 and 49.

(If for any reason a rivet should not lodge in the jaws 48 and 49, or should the magazine 39 become empty, it would be impossible to actuate the jaws 48 and 49, and in that event the reduced end 26 of the plunger 3| would travel clear through the jaws 48 and 49.) The jaws48 and49holding the rivet continue their downward movement until the rivet 39 is forced well through the material to be riveted. To release the rivet 39 from the jaws 48 and 49 at the desired instant, I provide an expansion cam mechanism between the jaws 48 and 49, which consists of a cam stud 61, having an enlarged conical head 68, which is securely screwed into the under side of the body l2 near the front, and extends downwardly through passageways 69 and 19 formed by semi-cylindrical grooves machined in each jaw. The upper portion 69 of the passageway, formed as aforesaid, is of sufiicient diameter to accommodate the shank of the cam stud 61. The lower portion 19 of the passageway so formed is graduated in diameter and is adapted i to accommodate the conical head 68 of the cam stud 61 to form a perfect cam surface therefor. As the jaws 48 and 49 continue to travel downwardly, the cam surface 19 engages the head 68 of the cam stud 91, causing the jaws 48 and 49 to separate and release the rivet 39, as indicated in Fig. '7. When the rivet is released, the jaws 48 and 49 are retracted to their normal positions, as shown in Figs. 1 and 2, and the rivet 39 isforcedthe rest of the way through the material and is clinched over on the anvil H which is secured to the under side of the rivet magazine 39 by screws 12, or other suitable means. The whole device is stabilized while in use by a cross member 13 which is attached to the under side of the free end of the riveting magazine 39 by any suitable means.

' To operate the device the feed magazine 39 is filled with the proper type of split rivets 39 and the feed slide 36, which is normally under constant tension of spring 32v is placed in position so that the feed slide 36 urges the rivets toward the jaws 48 and 49. Itwill be remembered that the feed slide 36 travels in the longitudinal slot 49, which also carries the rivets to be fed into the jaws 48 and 49. The slot 49 is in direct alignment with the grooves 66 formed in the jaws 48 and 49. The grooves 66, together with the grooves 65, also formed in the jaws 48 and 49, make a recess in the jaws of the size and shape of a rivet, and permit the introduction of a rivet into the jaws 48 and 49, which are normally closed while in the position of rest, as shown in Fig. 1. Handles l3 and I! are then grasped with one hand only, forcing the plunger 2| against the head of the rivet 39, which rivet 39, together with the jaws 48 and 49, are forced downwardly to the position indicated in Figs. 5 and 6. By this time the prongs of the rivet 39 have entered the material to be riveted, centralizing the end of the rivet while the head of the rivet is still between the jaws 48 and 49. If further pressure is then applied to the rivet, the jaws 48 and 49 are forced against the conical head 68 of the cam stud 61, causing the jaws 48 and 49 to separate and release the rivet 39, permitting the same to be pushed through and clear of the jaws 48 and 49, as shown in Fig. 7. During this operation the succeeding rivet is retained in the magazine 39 because the head of the succeeding rivet rides up against the jaws 48 and 49 and is prevented from entering said jaws until the slot 66 in the jaws 48 and 49 becomes aligned with the rivet head passageway of the slot 49. Instantly upon the rivet 39 leaving the jaws 48 and 49, the jaws are horizontally and vertically returned to their original position by the spring members 59 and 5| and 55 and 56, respectively.

The plunger 2 l however, is still further depressed to drive the rivet 30 through the material and against the anvil H to complete the stapling process. When the lever I! is released, it, together with the plunger 2 i, will be returned to its original position, as shown in Fig. 1, by the spring 23. When the plunger 2| andthe jaws 48 and 49 again return to their original positions, a second rivet can enter the jaws and the cycle'may be repeated until the rivets are exhausted from the said magazine.

, Having described my invention, what I claim and desire to secure by Letters Patentis:

1. In a riveting: machine, adapted to work on heavy materials, the combination of a body portion having a handle formed at one end thereof and an angularly disposed clevis formed at the other end thereof, a lever fulcrumed in said clevis,

a plunger in said body portion adapted to be actuated by said lever, a pair of reciprocating jaws in said body adapted to hold a rivet and to be actuated by said plunger while said rivet is being forced into the material to be riveted.

2. In a riveting machine, adapted to work on heavy materials, the combination of a body portion having a handle formed at one end thereof and an angularly disposed clevis formed at the other end thereof, a lever fulcrumed in said clevis, a plunger in said body portion adapted to be actuated by said lever, a pair of reciprocating jaws in said body adapted to hold a rivet and to be actuated by said plunger, and a rivet magazine secured to said body, said magazine having a feed slot in alignmentv with a recess formed in said jaws when said jaws are in their position of rest.

,3. In a riveting machine, adapted to work on heavy materials, the combination of a body portion having a handle formed at one end thereof and an angularly disposed clevis formed at the other end thereof, a lever fulcrumed in said clevis, a plunger in said body portion adapted to be actuated by said lever, a pair of reciprocating jaws in said body adapted to hold a rivet and to be actuated by said plunger, a rivet magazine secured to said body, said magazine having a feed slot in alignment with a recess formed in said jaws when said jaws are in their position of rest, a feed slide for said rivet magazine, and resilient means for urging said feed slide toward said jaws.

4. In a riveting machine, adapted to work on heavy materials, the combination of a body portion having'a handle formed at one end thereof and an angularly disposed clevis formed at the other end thereof, a lever fulcrumed in said clevis, a plunger in said body portion adapted to be actuated by said lever, a pair of reciprocating jawsin said body adapted to hold a rivet and to be actuated by said plunger, a rivet magazine secured to said body, said magazine having a feed slot in alignment with a recess formed in said jaws when said jaws are in their position of rest,

a feed slide for said rivet magazine, resilient means for urging said feed slide toward said jaws,

and means for adjusting and maintaining tension adapted to maintain said plunger and said lever in normally extended position. i

6. In a riveting machine, adapted to work on heavy materials, the combination of a body portion having a handleformed at one end thereof and an angularly disposed clevis formed at the other end thereof, a lever fulcrumed in said clevis, said lever having a depending head adapted to limit its upward movement, a plunger in said body portion adapted to be actuated by said lever, a pair of reciprocating jaws in said body adapted to hold a rivet and to be actuated by said plunger.

'7. In a riveting machine, adapted to work on heavy materials, the combination of a body portion having a handle formed atone end thereof and an angularly disposed clevis formed at the other end thereof, a lever fulcrumed in said clevis, a plunger in said body portion adapted to be actuated by said lever, a pair of reciprocating jaws in said body adapted to hold a rivet and to be actuated by said plunger, said jaws having resilient means adapted to urge said jaws together.

8. In a riveting machine, adapted to work on heavy materials, the combination of a body portion having a handle formed at one end thereof and an angularly disposed clevis formed at the other end thereof, a lever fulcrumed in said clevis, a plunger in said body portion adapted to be actuated by said lever, a pair of reciprocating jaws in said body adapted to hold a rivet and to be 0 actuated by said plunger, and resilient means for normally urging said jaws upwardly.

9. In a riveting machine, adapted to work on heavy materials, the combination of a body portion having a handle formed at one end thereof and an angularly disposed clevis formed at the other end thereof, a lever fulcrumed in said clevis, a plunger in said body portion adapted to be actuated by said lever, a pair of reciprocating jaws in said body adapted to hold a rivet and to be actuated by said plunger, and means for maintaining said jaws in vertical alignment.

10. In a riveting machine, adapted to work on heavy materials, the combination of a body portion having a handle formed at one end thereof and an angularly disposed clevis formed at the other end thereof, a lever fulcrumed in said clevis, a plunger in said body portion adapted to be actuated by said lever, a pair of reciprocating jaws in said body adapted to hold a rivet and to be actuated by said plunger, and a cam positioned between said jaws adapted to open said jaws while said jaws are being so actuated.

11. In a riveting machine, adapted to work on heavy materials, the combination of a body portion having a handle formed at one end thereof and an angularly disposed clevis formed at the other end thereof, a lever fulcrumed in said clevis, a plunger in said body portion adapted to be actuated by said lever, a pair of reciprocating jaws in said body adapted to hold a rivet and to be actuated by said plunger, an anvil piece secured to said body below and in alignment with said jaws and said plunger against which said rivet can be driven.

12. In a riveting machine, adapted to work on heavy materials, the combination of a body portion having a handle formed at one end thereof and an angularlydisposed clevis formed at the other end thereof, a lever fulcrumed in said clevis, a plunger in said body portion adapted to be actuated by said lever, a pair of reciprocating jaws in said body adapted to hold a rivet and to be actuated by said plunger, said plunger having a reduced head, said reduced head having a centrally disposed teat on its end, said teat being adapted to engage a recess formed in the head of said rivet.

13. A portable riveting machine, adapted to be used on heavy materials, which comprises a body portion having a handle formed integral therewith, a movable lever having its fulcrum on said body, said handle and said lever being adapted to be gripped in one hand, a plunger actuated by said lever, and a pair of reciprocating jaws adapted to hold a rivet and to be actuated by said plunger.

14. A portable riveting machine, which comprises a body portion, and a handle formed thereon, an actuating lever pivoted to said body, said handle and said lever being adapted to be gripped in one hand, a plunger actuated by said lever, a pair of reciprocating jaws, a rivet magazine secured to said body, said magazine having a feed slot in alignment with a recess formed in said jaws when said jaws are in their position of rest, said jaws and said plunger co-acting to sue-- cessively receive and transport rivets from said rivet magazine to the material to be riveted, means for releasing said rivets from said jaws, and means for clinching said rivets after being so released.

ROX'ION C. McKINNIE. 

